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A alone can do a piece of work in 12 days and B alone can do the same work in15 days. A works alone for 4 days. In how many days will A and B togetherthe remaining work? |
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Answer» answer is getting 4 4/9 A can do work in 12 days so in one day he can complete=1/12B can do work in 15 days so in one day he can complete=1/15if both work together then in one day work can complete=1/12+1/15=(5+4)/60=3/20 A alone work for 4 days s0 work done 4/12=1/3remaining work 1-1/3=2/3now both are working together so days required=(2/3)/(3/20)=(2×20)/9=40/9=5 days. |
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